org.apache.commons.io.output

类 NullWriter

java.lang.Object

java.io.Writer

org.apache.commons.io.output.NullWriter

所有已实现的接口:

Closeable, Flushable, Appendable, AutoCloseable

public class NullWriter
extends Writer

This Writer writes all data to the famous /dev/null.

This Writer has no destination (file/socket etc.) and all characters written to it are ignored and lost.

字段概要

字段

限定符和类型	字段和说明
static NullWriter	NULL_WRITER A singleton.

从类继承的字段 java.io.Writer

lock

构造器概要

构造器

构造器和说明
NullWriter() Constructs a new NullWriter.

方法概要

限定符和类型	方法和说明
Writer	append(char c) Does nothing - output to /dev/null.
Writer	append(CharSequence csq) Does nothing - output to /dev/null.
Writer	append(CharSequence csq, int start, int end) Does nothing - output to /dev/null.
void	close()
void	flush()
void	write(char[] chr) Does nothing - output to /dev/null.
void	write(char[] chr, int st, int end) Does nothing - output to /dev/null.
void	write(int idx) Does nothing - output to /dev/null.
void	write(String str) Does nothing - output to /dev/null.
void	write(String str, int st, int end) Does nothing - output to /dev/null.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

字段详细资料

NULL_WRITER

public static final NullWriter NULL_WRITER

A singleton.

构造器详细资料

NullWriter

public NullWriter()

Constructs a new NullWriter.

方法详细资料

append

public Writer append(char c)

Does nothing - output to /dev/null.

指定者:

append 在接口中 Appendable

覆盖:

append 在类中 Writer

参数:

c - The character to write

返回:

this writer

从以下版本开始:

2.0

append

public Writer append(CharSequence csq,
                     int start,
                     int end)

Does nothing - output to /dev/null.

指定者:

append 在接口中 Appendable

覆盖:

append 在类中 Writer

参数:

csq - The character sequence to write

start - The index of the first character to write

end - The index of the first character to write (exclusive)

返回:

this writer

从以下版本开始:

2.0

append

public Writer append(CharSequence csq)

Does nothing - output to /dev/null.

指定者:

append 在接口中 Appendable

覆盖:

append 在类中 Writer

参数:

csq - The character sequence to write

返回:

this writer

从以下版本开始:

2.0

write

public void write(int idx)

Does nothing - output to /dev/null.

覆盖:

write 在类中 Writer

参数:

idx - The character to write

write

public void write(char[] chr)

Does nothing - output to /dev/null.

覆盖:

write 在类中 Writer

参数:

chr - The characters to write

write

public void write(char[] chr,
                  int st,
                  int end)

Does nothing - output to /dev/null.

指定者:

write 在类中 Writer

参数:

chr - The characters to write

st - The start offset

end - The number of characters to write

write

public void write(String str)

Does nothing - output to /dev/null.

覆盖:

write 在类中 Writer

参数:

str - The string to write

write

public void write(String str,
                  int st,
                  int end)

Does nothing - output to /dev/null.

覆盖:

write 在类中 Writer

参数:

str - The string to write

st - The start offset

end - The number of characters to write

flush

public void flush()

指定者:

flush 在接口中 Flushable

指定者:

flush 在类中 Writer

另请参阅:

Writer.flush()

close

public void close()

指定者:

close 在接口中 Closeable

指定者:

close 在接口中 AutoCloseable

指定者:

close 在类中 Writer

另请参阅:

Writer.close()